Slug casting machine



June 9, 1936.

G. P. KmGsBuRY SLUG CASTING MACHINE Filed Feb. 16, 1935 4 Sheets-Sheet l1 VENTO HZLW.

A TTORNEY June 9, 1936.

a. P. KINGS BURY SLUG CASTING MACHINE Filed Feb. 16, 1935 4 Sheets-Sheet2 llk lkhhlkll.

ATTORNEY June 9, 1936. e. P. KINGSBURY 2,043,755 SLUG CASTING MACHINEFiled Feb. 16, 1935 4 Sheets-Sheet 3 Illll A Tram/5y l VENTOR June 9,1936. G. P. KINGSBURY' SLUG CASTING MACHINE Filed Feb. 16, 1935 4Sheets-Sheet 4 -11v VENTOR w w w .A TTORNEY Patented June 9, 1936 PATENTOFFICE SLUG CASTING MACHINE George Peyton Kingsbury, Hollis, N., Y.,assignor' to Mergenthaler Linotype Company, a corporation of New YorkApplication, February 16, 1935, Serial No. 6,796 20 Claims. (or. 199-56)This. invention relates to sine casting machines of the generalorganization representedin U. S.

Letters Patent to O. Mergenthaler No. 436,532,

wherein a type bar or slug is cast in a slotted mold against a composedline of matrices, and then forced out of the, mold and into a galleybyan ejector which advances against the rear edge thereof.

As is well known, the mold. is fixedly mounted on a mold wheel orcarrier, and during each ma-- chine cycle of operation the carrieris'rotated through a quarter revolution to carry the mold from theejecting to the casting position, and thence through the remainingthree-quarter revolution to carry the'mold from the castingposition-back to the ejecting position. At, the. casting position, thecomposed line of matrices is presented momentarily to one face of themold, a metal pot brought against the opposite face of the mold, andmolten metal injectedby a pump from the metal pot into the mold whereitcongeals against the line of matrices to form the type bar or slug.During the formation of the type bar'or slug considerable heat isabsorbed by the mold, hence it is customary to cool the stud about whichthe mold carrier rotates so that when the machine is run continuously toproduce a number of slugs, the heat thus absorbed by the mold does notaccumulate to the extent that it prevents the slugs fromcongealing atthe proper rate; While in general, this arrangement is satisfactory, yet

in certain machines, as for example, those adapted to the production ofslugs above 36-point in thickness and up to 42 ems in length, it hasbeen found advisable to employ an auxiliary cooling chamber. Thisauxiliary cooling chamber is usually located at the ejecting station inaposition closely adjacent the rear face of the mold and heretofore ithas been fixedly mounted with sufficient intermediate clearance topermit free rotation of the mold carrier. In practice, however, it. hasbeen found that this auxiliary cooling chamber is limited in itseffectiveness due to the fact that the clearance between the back of themold and the face of the auxiliary cooling chamber constitutes an airpocket which tends to prevent the transfer of heat from the mold to theauxiliary cooling chamber.

To overcome this objection and, the attendant difficulties it isproposed to bring the mold and the cooling chamber together incontacting relation during a pause in the rotationof the mold carrierand to hold them thus under. pressure during this period to insure; goodthermal contact therebetween, and tothis end .the auxiliary coolingchamber, in the present embodiment of; the, invention, is; resilientlymounted on the machine and means are provided which operatesautomatically to move the mold carrier backwardly beyond'its rotatingposition to carry the mold into contact withthe cooling chamber at theend of a machine cycle of operation and then to move the mold carrierforwardly to its rotating position to carry the mold out of contact withthe cooling chamber at the beginning of the next succeeding machinecycle of operation.

For a clear understanding of the invention, reference may be madeto theaccompanying drawings wherein;

g/1 is a side view, partially in section, of a' machine embodying theprinciples of the present invention Fig. 2 is a front view showing amold mounted on a mold carrier andhaving a portion of the mold brokenawayto show the position of the cooling unit behind themold;

Fig. 3 is a rear view, in section, the section being taken alongtheline33 of Fig; 4, which, in

turn, is, a plan View, in section, taken along the line4-4 of Fig. 2 andshowing the mold presented against the face of the cooling chamber;

Fig. 5 is aview similar to the view shown in Fig. 4, but showing themold spaced from the cooling chamber;

Fig. 6 is an enlarged detail view of the mechanism employed inreciprocating the mold carrier and,

Fig, '7 is a view similar to Fig. 6, and which, when taken in connectionwith Fig. 6 shows the distance that the mold carrier is retracted beyondthe positionit usually assumes at the end of a machine cycle ofoperation.

The mold I0 comprises, as usual, a body portion I land a cap portion l2which constitute the side walls of a mold cavity l3, and intermediateliners M which constitute the end walls of the cavity, the rear faces ofthe various elements of the mold being so shaped or formed asto-proscrews 10.

As is. wellilgnown, the mold wheel lt durlng;

the production of a type bar or slug and again during the ejectingoperation to carry the mold 19 into and out of engagement with a pair oftrimming knives (not shown) between which the type bar or slug passesas, it is forced out of the mold ill by the action of a fore and afterejector slide 2| and composite ejector blades 22 which are mounted forreciprocation in the mold slide l8.

The reciprocatory movement of the mold carrier I6 is accomplished, asusual, by the mold slide '18 which carries the lateral arm or hub l1upon which it is mounted, the mold slide l8 being moved forwardly andbackwardly in guideways 23 under the influence of a continuously groovedface cam 24 which is mounted on the main drive shaft 25 of the machineand to which the slide is operatively connected by mechanism including asuspended lever 26, the upper end of which is pivotally secured, as by astud 21, to the main frame of the machine and the lower end of which isprovided with a rearwardly disposed roller 28 posi- 'tioned in thecontinuous groove 29 in the face of the cam 24 and with a forwardlydisposed roller 39 positioned in a recess 3| formed in the rear end ofthe mold slide l8.

Ordinarily, the mold carrier I6, in receding after ejection, is arrestedin its rotating position as the machine comes to rest after completing amachine cycle of operation, but in accordance with the present inventionmeans are provided for retracting it slightly beyond its rotatingposition "at this time to carry the mold l0 into contact with a coolingchamber A and then at the start of the next cycle to restore it to itsrotating position so as to break the contact between the mold and thecooling chamber.

The cooling chamber A, as best shown in Figs. 2, 3, 4 and 5, is locatedat the ejecting station and it comprises a vertically disposed housingmember 32 closed at its front end by a face plate 33 and an interveninggasket 34, the face plate 33 and gasket 34 being secured to the walls ofthe housing member 32 by screws 35. The face plate 33 is desirably madefrom a good heat conducting metal, and it is shaped to conform with therear face of the cap portion l2 of the mold l0; and to permit the faceplate 33 to be cooled, the housing member 32 is provided with an inletpipe 33 and with an outlet pipe 31, the inlet pipe 36 being adapted andarranged to be connected to a source of water or other cooling mediumand the outlet pipe 31 being adapted and arranged to be connected to asuitable drain.' v

In the present instance, the cooling chamber A is slidably mounted onthe forward end of the mold slide l8, this sliding connection beingobtained by positioning two tongues 38 and 39 carried ,by the housingmember 32 in horizontal grooves 40 and M respectively which are cut inthe sideface of the mold slide l8, and to prevent the tongues fromfalling out of the grooves a vertically disposed plate 42 is fastened,as by the mold slide 18 by a compression spring 43 disposed in the rearend of a horizontally disposed cylinder 44 threaded into a recess 45 inthe main frame of the machine, the front end of the spring 93 beingpositioned against the rear face of a plunger 45 which is slidablymounted in a guide nut 43 threaded into the outer end of the cylinder 44and the forward end face of which engages the oppositely disposed rearend face of an adjusting screw 4! carried by the rear wall of thehousing member 32, and to limit the forward movement of the coolingchamber A under the influence of the compression spring 43, thevertically disposed plate 42 is provided with a stud 48 which extendsinto a slot 49 cut in the side face of the lower tongue 39.

The retraction of the mold carrier l6 beyond its rotating position tocarry the mold Ii! into engagement with the face plate 33 of the coolingchamber'A as the machine comes to rest after completing a machine cycleof operation, and'its advancement to its rotating position to carry themold out of engagement with the face plate 33 at the beginning of thenext machine cycle of operations is accomplished, in accordance with thepresent embodiment of the invention, by means including the continuouslygrooved face cam 24 which makes one complete revolution during eachmachine cycle of operation, and to this end, as best shown in Fig. 1,the continuous groove 29 in the face of the cam 24 is so formed as topresent a recessed segment 50 in addition to two low segments 5! and 52and two high segments 53 and 54. As usual the first low segment 5| isadapted and arranged to maintain the mold carrier It in its rotatingposition while it is being rotated from the ejecting to the castingposition, the succeeding first high segment 53 is adapted and arrangedto advance the mold carrier It to and maintain it in its forwardposition while a type bar or slug is being cast in the mold l0 and thento restore it to its rotating position, the succeeding second lowsegment 52 is adapted and arranged to maintain the mold carrier I6 inits rotating position while it is being rotated from the casting aroundto the ejecting position again, and the succeeding second high segment54 is adapted and arranged to advance the mold carrier iii to andmaintain it in its forward position while the type bar or slug is beingejected from the mold in and then i to retract it after the slug hasbeen ejected. The recessed segment 50 which is provided in thecontinuous groove 29 in the face cam 24 is positioned between the end ofthe second high segment 5'4 which retracts the mold carrier I 6 afterthe slug has been ejected from the mold l0 and the beginning of thefirst low segment 5| which maintains the mold carrier H5 in its rotatingposition while -it is being rotatedfrom the ejecting to the castingposition, and it is formed by cutting away the inner wall of thisportion of the continuous groove 29 and by adding a cam plate 55 to theoppositely disposed portion of the outer wall of the groove.

Under these conditions, the rearwardly disposed roller 28 which iscarried by the lower end of the suspended lever 26 becomes engaged bythe recessed segment 50 as the machine comes to rest at the end of amachine cycle of operation and by the first low segment 5! in thecontinuous groove 29 of the face cam 24 when the next machine cycle ofoperation is started. As the recessed segment 55 engages the rearwardlydisposed roller 28 at the end of a machine cycle of operation the moldcarrier I6 is carried backwardly beyond its rotating position and, asshown I'U is pressed against the faceplate 33 oi the resiliently mountedcooling chamber A. Thenas the rearwardlydisposed roller 28 becomesengaged by the first 10w segment 51 of the continuous groove 29 at thebeginning of the next succeeding machine cycle of operation, the moldcarrier I6 is carried forwardly to its rotating position and, as shownmore clearly in Fig. 5, the rear face of the mold I0 is carried out ofcontact with the face plate 33. Hence, during the interval betweensuccessive machine cycles of operation, the rear face of the mold I0 ismaintained in, contact with the face plate 33 under pressure exerted bythe compression spring 43 and as a result heat from the mold I0 istransferred to the cooling chamber A at a rate faster than heretoforepossible.

In the accompanying drawings, the invention has been shown merely inpreferred form and by way of example, but obviously many changes andvariations may be made therein and in the mode of application withoutdeparting from its spirit. It should be understood, therefore, that theinvention is not limited to any specific form or embodiment except in sofar as such limitations are set forth in the appended claims.

Having thus described my invention, I claim:

1. In a slug casting machine, the combination of a mold, a coolingchamber therefor, and means for disestablishing and establishing contactbetween said mold and said chamber during a machine cycle of operation.

2. In a slug casting machine, the combination of a mold, a resilientlymounted cooling chamber, and means for disestablishing and establishingcontact between said mold and said cooling chamber during a machinecycle of operation.

3. In a slug casting machine, the combination of a mold, a coolingchamber therefor, and means for bringing said mold and said chamber intocontact with one another at the end of a machine cycle of operation andfor separating said mold and said chamber at the beginning of the nextcycle of operation.

4. In a slug casting machine, the combination of a mold, a coolingchamber, means for presenting said mold against said chamber at the endof a machine cycle of operation and for separating said mold and saidchamber at the beginning of the next cycle of operation, and means formaintaining said mold and said chamber together under pressure duringthe time said mold is presented against said chamber.

5. In a slug casting machine, the combination of a mold, a coolingchamber therefor, and a rotatable mold carrier, said carrier beingmovable forwardly from a position of rest to its rotating position andthereafter backwardly from its rotating position during each machinecycle of operation to carry the mold against said chamber.

6. In a slug casting machine, the combination of a mold, a coolingchamber therefor, a rotatable mold carrier, said carrier being movableforwardly from a position of rest to its rotating position andthereafter backwardly from its rotating position during each machinecycle of operation to carry the mold against said chamber, and means formaintaining said mold against said chamber under pressure.

7. In a slug casting machine, the combination of a. mold, a coolingchamber therefor, a mold carrier, a slide whereon the said carrier isrotatably mounted, and means operable during each machine cycle ofoperation for moving said slide forwardly to locate the carrier initsrotating position and thereafter backwardly from its rotatingposition 'to carrythe moldagainst the cooling chamber.

8. A combination as in claim 7, characterized by the fact that the saidmeans consists of a power driven cam operatively connected to the slide.

9. A combination as in claim 7, characterized by the fact that thecooling chamber is slidably mounted on the mold slide.

10. In a slug casting machine, the combination of a mold, a coolingchamber therefor, a mold carrier, a slide whereon said carrier isrotatably mounted, and means operable during each machine cycle ofoperation for moving said slide forwardly to locate the carrier in itsrotating position and thereafter backwardly from its rotating positionto resiliently present said mold against said cooling chamber.

11. In a slug casting machine, the combination of a mold and a coolingchamber therefor, said chamber being capable of bodily movement inmaking and breaking contact with said mold.

12-. In a slug casting machine, the combination of a mold capable ofreciprocable movement during each machine cycle of operation and acooling chamber arranged in the reciprocal path of the mold, saidchamber being resiliently mounted.-

13. In a slug casting machine, the combination of a mold, a rotatablecarrier therefor movable forwardly from a position of rest to itsrotating position and thereafter backwardly from its rotating positionto its position of rest during each machine cycle of operation, and acooling chamber resiliently mounted and adapted to yield under pressureof the mold as the carrier alternates its position of rest.

14. In a slug casting machine, the combination of a mold, a coolingchamber therefor movably mounted and arranged in contacting relation tothe mold, and a spring associated with said chamber for holding itresiliently against the mold.

15. In a slug casting machine, the combination of a mold, a moldcarrier, means for intermittently rotating said carrier to advance saidmold from the slug ejecting position to the slug casting position andthence to the slug ejecting position during each machine cycle ofoperation, a cooling chamber, and means for bringing said mold and saidchamber into contact with each other after the slug ejecting operationand for separating said mold and said chamber before the rotation of thecarrier during a next succeeding cycle of operation.

16. In a slug casting machine, the combination of a mold, a mold carriertherefor, means for intermittently rotating said carrier to advance saidmold from the slug ejecting position to the slug casting position andthence to the slug ejecting position during each machine cycle ofoperation, a cooling chamber, and means for presenting said mold againstsaid chamber after said mold has been restored to its slug ejecting position and for separating said mold from said chamber before the rotationof said carrier during a succeeding machine cycle of operation.

17. A combination as set forth in claim 16 characterized in that thecooling chamber is resiliently mounted so that contact between the moldand the chamber is assured and maintained.

18. In a slug casting machine, the combination of an intermittentlyrotatable element, a cooling chamber therefor, and means forestablishing contact therebetween only during a pause in the rotation ofthe element.

19. In a slug casting machine, the combination of an intermittentlyrotatable element, a cooling of an intermittently rotatable element, aresilchamber therefor, and. means for establishing iently mountedcooling chamber therefor, and and. disestablishing contact therebetweenonly means for establishing contact therebetween only during a pause inthe rotation of the element. 5 during a pause in the rotation of theelement. GEORGE PEYTON KINGSBURY. 5

- 20. In a slug casting machine, the combination

